31. The advent of sex determination tests has brought the new practice of aborting female fetuses. 32. Therefore, SRY plays an important role in sex determination . 33. Studies have shown that two copies of the gene are necessary for male sex determination . 34. Since then, many different types of sex determination systems have been discovered, particularly in plants. 35. Sex determination in mammals originates with the chromosome of the sperm that fertilizes the egg.36. But the Mittals became upset when asked about the use of ultrasound for sex determination . 37. Sex determination by ultrasound is commonly possible in the fourth, fifth or sixth month of pregnancy.38. Could research into sex determination benefit from being a bit less . . . well, sexist? 39. XY sex determination is found in other organisms, including the common fruit fly and some plants. 40. Sex determination in sciara is a different mechanism.
